Visible fluid-feed indicator.



PATENTED AUG. 7, 1906. 0. GRAHAM. VISIBLE FLUID FEED INDICATOR.

" APPLICATION FILED AUG. 5, 1905.

UNITED STATES PATENT OFFICE.- CHAUNCEY L; GRAHAM, or oinoAediLLmoIs, ASSIGNOR T ARVILLAM. GRAHAM, or CHICAGO, ILLINOIS.

VISIBLE FLUID-FEED mo cA'ron.

Specification of Letters Patent.

Patented Aug. '7', 1906.

- Application filed August 5, 1905. Serial No. 272,799.

To all whom, it may concern.-

. Be it known that I, CHAUNOEY L. GRAHAM,

new and useful Improvements in Visible Fluid-Feed Indicators, of which the followin isa specification.

his invention relates to a visible-feed indicator for force-feed lubricators and other like apparatus from which the flow is of an internuttent nature; and the present improvement has for its object to provide a durable and effective structural arrangement and, combination of parts whereby a cona vertical section of the same on line a; x,

1. imilar numerals of reference indicate like I parts in both views.

Referring to th drawings, land 2 are substantially counterpart end heads constituting the inlet and outlet trunks of the indic'ator and adapted for connection with the opposedends ofthe tube, the flow through which is to be visibly indicated as usual in the present class of indicators.

3' is a skeleton casing adapted to connect the end heads together in a substantial man-" ner and afford a protection to the transparent sight-tube 4 of the indicator as usual.

5 and 6 are the inlet and outlet nipples of the end heads, preferablylarranged 1n axial alinement, as shown.

The present invention comprises the pro vision in a transparent wall-indicator, of any usual and suitable form, of an indicating means as follows:

7 is an indicator body. or member of any suitable form and material loosely arranged in the interior of the indicator in the ath of the flow of fluid through the same an inside of a transparent wall of the indicator. Such body or member is preferably 'of a color in strong contrast with the color of the fluid passing through the indicator, so that a movement of said body or member due to a flow or pulsation of the fluid,'as hereinafter more fully set forth, will be glaringly visible to the party in charge ofthe apparatus.

.8 is a supporting connection attached-to. the body or member 7 (whereby the latter is i. suspended) and to an interior fixed part of the ihdicator and adapted to maintaintheoo said body or member 7 in a visible position behind a transparent wall of the indicator and at the same time confine the movement of the said member within the interior of the indicator. In the preferred form of the present invention said supporting connection I will consist of a li ht spring of a coiled .orserpent'ine form an is adapted vto permit of a free upward movement of the body or memher 7 under the-influence of a pulsating or in termittent flow through the indicator and at the same time cause a down or return move ment of said body or member before a succeeding pulsation of the fluid takes place.

The indicator body or member 1s prefer- 7 5 ably of a cup shape, as shown in Fig. 2, so as to nearly occupy the transverse area of the transparent sight-tube 4, in which it is arranged, and such cup-shaped member is provided with one or more orifices 9 to permit 8o the passage of the fluid in a down or return movement of said member in the practical operation of-the appliance.

The present indlcator is more especially intended for use with class of force-feed lubricators in whicha series of single-acting pumps are employed to force the lubricant to a series of bearings at recurrin intervals. 7

Having thus fully escribed m said in-' vention, what I claim as new, an desire to 0 secure by Letters Patent, is-

'1. A visible fluid-feed indicator compris ing a lower head, an upper head, a cylindrical skeleton casing having its ends secured in the heads, a transparent tube within the casing, 5 an indicator, and a coiled spring whereby the indicator is suspended wit in the tube from the upper head.

2. A visible flu'id-feedindicator compris-- ing a lower he'ad having a nipple, anupper head having a nipple, a cylindrical skeleton casing having'its ends secured in the heads around the nipples, a transparent tube within the casing, an indicator, and a coiled spring whereby the indicator is suspended within v the tube from the nipple of the upper head.

skeleton casing, having its ends secured in heads, a transparent tube Within the casing, a cup-shaped indicator, and a coiled ded Within the tube from the upper v*isihle fiuid-indicator comprising a having a ni ple, an upper head nipple, a cylind rical slieleton casin meg its ends secured in the heads around nipples, a transparent tube Within the 9'. a cup-shaped indieator, and a coiled whereby the indicator is suspended in the tube from the nipple of the upper a visible fluid-feed indicator comprisnrer head, an upper head, a cylindrical n casing, having its ends secured in r a transparent tube Within the'cas- 1 i e, cup-shaped indicator having an orifice mg Whereb tne cu -sha ed indicator is for the passage of fluid, and a coiled spring whereby the cup-shaped indicator is suspended Within the tube from the upper head.

6. A visible fluid-indicator comprising 'a' lower head having a ni ple, an upper head spring whereby the indicator is suspended m in the tube from the nipple of the upper ea p I Signed: at Chicago, Illinois, this 3d day of 'August, .1905.

- CHAUNCEY L, GRAHAM.

Witnesses ROBERT BURNS, M. H. HOLMES. 

